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Avalanche Forecast

Archived

Nov 25th, 2022–Nov 26th, 2022

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

McGregor.

Continuously assess conditions as you move through terrain. Storm and wind slabs could build throughout the day. Use extra caution at treeline where storm slabs could overlie surface hoar and facets.

Confidence

Moderate

Avalanche Summary

Observations in the region are limited. If you are out in the backcountry please consider filling out a Mountain Information Network report.

Snowpack Summary

A series of storms over the past few days has brought 40 to 70cm of new snow with strong southwest winds. This new snow has likely formed wind slabs in exposed terrain at higher elevations and buries a variety of surfaces at treeline including facets, surface hoar, a crust and bare ground. At lower elevations most of this recent precipitation would likely have fallen as rain.

Weather Summary

Tonight

Flurries bringing around 5cm of new snow with strong west-southwest winds. Temperatures at 1600m around -5.

Saturday

Stormy weather bringing 15 to 30cm with strong southwest winds. Freezing levels rising to around 1000m.

Sunday

A mix of sun and cloud with the possibility of light flurries bringing trace amounts of new snow. Low of -15 at 1600m and light winds from the northwest.

Monday

Mostly sunny with no new snow expected. Light winds and a low of -18 at 1600m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Make observations and assess conditions continually as you travel.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.